35s, 3.73, Ford Performance Tune and You

[Tavjon]

Correct, its a bit taller in the rear right now.

Would a leveling kit fix all of that? Any recommendations?

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[Noremac]

Would a leveling kit fix all of that? Any recommendations?

being taller in the rear is all my doing, it was pretty level up until the latest antics... I relocated the struts up 2", wife didnt mind the additional rake (even though it bugs me), so i didnt pull the 2" puck out.

 

[Aonarch]

Fine as in it the internals won't kill themselves?

I drive like a grandma, think I'll have a huge mpg hit with the setup?

Depends on wheel and tire weight.

But yes, you will see a drop. I'd expect 16-17 mpg highway if lifted.

 

[indio22]

I've got this setup on our '21 BB 2 door, but with 37" KM3's. I run it in Sport mode 100% of the time on pavement and have been very happy with it. Mileage isn't terrible at all.

Would you say that the auto trans is generally making the correct gear choices for you with that setup? Meaning it's not shifting too far into the higher overdrive gears and bogging down?

That's an aspect I've wondered about, if setting the computer with the new tire radius is enough for it to know when to make the ideal shift decisions. I'm assuming the computer would probably not use the top most overdrive gear much with your setup?

 

[Johnny Rebel]

Would you say that the auto trans is generally making the correct gear choices for you with that setup? Meaning it's not shifting too far into the higher overdrive gears and bogging down?

That's an aspect I've wondered about, if setting the computer with the new tire radius is enough for it to know when to make the ideal shift decisions. I'm assuming the computer would probably not use the top most overdrive gear much with your setup?

It’s perfectly fine. I added Sport mode with ForScan. When engaged, it rarely shifts past 8th, which seems to be about right.

If I run it in Normal mode, it tends to hunt between 8-10 quite a bit on the freeways, but it’s still not terrible. However, I get better mileage in Sport mode running in 8th because it tends to keep boost pressures lower.

 

[lakesinai]

Anyone riding with this setup? I know 35s and 3.73 can kinda blow on the highway and offroad but has anyone combed these three all together?

I have a 3.73 and thinking about going 35s with Ford 2 inch lift kit as well as the tune. Any thoughts?

Remember you have the weaker (non-SAS) axles and drivetrain along with a higher gear and bigger tires than designed, all adding stress. Then add the tune . . . Will the tune reduce stress to the drivetrain by compensating shift points, or will the tune add even more power and stress? If so, will you be doing high-stress offroading or gentler activities. Many of us got the 4.27 axles so we could add 35's to a Hoss 1 rig. Adding 35's to the 3.73 is pushing it, although "everyone does it!" All that said, I'd feel ok if it was a dealer-installed Ford Performance 2" shocks, which were offered to SAS a Bronco and a dealer installed Ford Performance tune, and I had the Ford Protect PremiumCare warranty . . . Ford would be taking all the risk (with your money).

 

[Brian_B]

Don't automatic transmissions usually shift according to some combination of engine RPM and required torque? The shift points aren't just Engine RPM/Wheel Speed...

I mean, they know to downshift going up a hill (because you need more torque), or when you try to accelerate hard (because you need more torque), and to upshift if torque requirement is low and engine speed is high.

 

[Tavjon]

If so, will you be doing high-stress offroading or gentler activities.

Pavement. Regular driving around

 

[SASQTCH]

Anyone riding with this setup? I know 35s and 3.73 can kinda blow on the highway and offroad but has anyone combed these three all together?

I have a 3.73 and thinking about going 35s with Ford 2 inch lift kit as well as the tune. Any thoughts?

My wife has the 2.3l auto and I just put the 35” SAS wheels/tires on it.

It’s not as peppy but seemed to handle it well.

I’m opting to go with a 285/70/17 Mickey Thompson Baja Boss AT (49lbs per tire), plus the surface area with the pavement is 10% less which should help with MPGs and adding back the peppyness.

The 315/70/17 SAS tires are 7% more from a rotational distance perspective versus the Big Bend stock tires. The 285s are 1%.

I’ll basically be running 33’s over the SAS 34.4’s and I think the 2.3 and transmission will like them better.

 

[JediMcMuffin]

I just switched to Falken Wildpeak R/T01s in 315/70/17, nearly 20lbs heavier than the sasquatch tire. I didn't really understand what folks were saying about weight but it sure is noticeable so now I'm pricing out some lighter wheels, but its not a huge priority.

 

[nolimits]

I just switched to Falken Wildpeak R/T01s in 315/70/17, nearly 20lbs heavier than the sasquatch tire. I didn't really understand what folks were saying about weight but it sure is noticeable so now I'm pricing out some lighter wheels, but its not a huge priority.

For the money, RTR is hard to beat. Around $270/ea and weight is either 22.5# or 26# depending which wheel you select.Also they are hub centric. Plus have good rep. And not hard to find at least 10% off.

Another good option is Method. They have several wheels. The 703’s are popular and around upper 26 to upper 27# depending on offset, etc.

In comparison, stock SAS wheels are around 34-35# each with beauty rings. More with the real bead lock kit. My non-SAS Badlands wheels are around 28#. So depending what you are running now you could pick up some decent weight savings.

Other choices exist, just these are popular and fairly low dollar. Good luck!

https://www.rtrvehicles.com/products/rtr-tech-6-bronco-ranger-wheel

https://www.rtrvehicles.com/products/rtr-evo-6-bronco-ranger-wheel

 

[mpeugeot]

@gpstrackershop1 4.10 or 4.56 gears seems like a Jeep recommendation, did you let AI write that recommendation?

I don't know of any available 6G Bronco gears in 4.10:1 or 4.56:1. Also the carrier is welded to the ring gear, making gear swaps impractical on a 3.73 equipped Bronco.

Maybe a better recommendation would be to replace the M190 FDU and M220 open rear axle with the M210 locking FDU and M220 locking rear axle with either 4.46:1 or 4.70:1 ratios.

 

[Fordified1]

Would you say that the auto trans is generally making the correct gear choices for you with that setup? Meaning it's not shifting too far into the higher overdrive gears and bogging down?

That's an aspect I've wondered about, if setting the computer with the new tire radius is enough for it to know when to make the ideal shift decisions. I'm assuming the computer would probably not use the top most overdrive gear much with your setup?

The transmission selects gears by rpm and torque load. So it should never bog down especially in sport mode (eco seems a little boggy to me). It just may never shift into 10th gear but so what. There are 9 others. I believe 8 9 and 10 are over drive, 9 and 10 for sure.
I am really impressed with how the 10-speed selects gears. Supposedly the tune even makes it better.

 

[Tavjon]

The transmission selects gears by rpm and torque load. So it should never bog down especially in sport mode (eco seems a little boggy to me). It just may never shift into 10th gear but so what. There are 9 others. I believe 8 9 and 10 are over drive, 9 and 10 for sure.
I am really impressed with how the 10-speed selects gears. Supposedly the tune even makes it better.

Yea i think 2.3l 35s and 2inch comboed with Ford Tune and Injen CAI will probably be the setup I'm going with.

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